Create a new secondary index for a relation (4.1.0 - 4.2.3 only, PECL)
mixed dbplus_rsecindex ( resource relation, mixed domlist, int type )


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dbplus_rsecindex() will create a new secondary index for relation with consists of the domains specified by domlist and is of type type

domlist may be passed as a single domain name string or as an array of domain names.

Returns resource on success or DBPLUS_ERR_UNKNOWN on failure.